Re: [PATCH for-8.0] hw: Add compat machines for 8.0

[Cornelia Huck <cohuck@redhat.com>]

On Fri, Nov 18 2022, Thomas Huth <thuth@redhat.com> wrote:

> On 11/11/2022 13.45, Cornelia Huck wrote:
>> Add 8.0 machine types for arm/i440fx/m68k/q35/s390x/spapr.
>> 
>> Signed-off-by: Cornelia Huck <cohuck@redhat.com>
>> ---
> ...
>> diff --git a/hw/i386/pc_piix.c b/hw/i386/pc_piix.c
>> index 0ad0ed160387..1c0a7b83b545 100644
>> --- a/hw/i386/pc_piix.c
>> +++ b/hw/i386/pc_piix.c
>> @@ -435,7 +435,7 @@ static void pc_i440fx_machine_options(MachineClass *m)
>>       machine_class_allow_dynamic_sysbus_dev(m, TYPE_VMBUS_BRIDGE);
>>   }
>>   
>> -static void pc_i440fx_7_2_machine_options(MachineClass *m)
>> +static void pc_i440fx_8_0_machine_options(MachineClass *m)
>>   {
>>       PCMachineClass *pcmc = PC_MACHINE_CLASS(m);
>>       pc_i440fx_machine_options(m);
>> @@ -444,6 +444,18 @@ static void pc_i440fx_7_2_machine_options(MachineClass *m)
>>       pcmc->default_cpu_version = 1;
>
> Instead of renaming pc_i440fx_7_2_machine_options() and introducing a new 
> pc_i440fx_7_2_machine_options() below, what about moving 
> pcmc->default_cpu_version = 1 into pc_i440fx_machine_options() instead, like 
> it is done with all other options? Then you could introduce a completely new 
> pc_i440fx_8_0_machine_options() which would be way more logical (also when 
> looking at this file with "git blame" later).
>
>>   }
>>   
>> +DEFINE_I440FX_MACHINE(v8_0, "pc-i440fx-8.0", NULL,
>> +                      pc_i440fx_8_0_machine_options);
>> +
>> +static void pc_i440fx_7_2_machine_options(MachineClass *m)
>> +{
>> +    pc_i440fx_8_0_machine_options(m);
>> +    m->alias = NULL;
>> +    m->is_default = false;
>> +    compat_props_add(m->compat_props, hw_compat_7_2, hw_compat_7_2_len);
>> +    compat_props_add(m->compat_props, pc_compat_7_2, pc_compat_7_2_len);
>> +}
>> +
>>   DEFINE_I440FX_MACHINE(v7_2, "pc-i440fx-7.2", NULL,
>>                         pc_i440fx_7_2_machine_options);
>>   
>> diff --git a/hw/i386/pc_q35.c b/hw/i386/pc_q35.c
>> index a496bd6e74f5..10bb49f679b0 100644
>> --- a/hw/i386/pc_q35.c
>> +++ b/hw/i386/pc_q35.c
>> @@ -370,7 +370,7 @@ static void pc_q35_machine_options(MachineClass *m)
>>       m->max_cpus = 288;
>>   }
>>   
>> -static void pc_q35_7_2_machine_options(MachineClass *m)
>> +static void pc_q35_8_0_machine_options(MachineClass *m)
>>   {
>>       PCMachineClass *pcmc = PC_MACHINE_CLASS(m);
>>       pc_q35_machine_options(m);
>> @@ -378,6 +378,17 @@ static void pc_q35_7_2_machine_options(MachineClass *m)
>>       pcmc->default_cpu_version = 1;
>
> dito
>
>>   }
>>   
>> +DEFINE_Q35_MACHINE(v8_0, "pc-q35-8.0", NULL,
>> +                   pc_q35_8_0_machine_options);
>> +
>> +static void pc_q35_7_2_machine_options(MachineClass *m)
>> +{
>> +    pc_q35_8_0_machine_options(m);
>> +    m->alias = NULL;
>> +    compat_props_add(m->compat_props, hw_compat_7_2, hw_compat_7_2_len);
>> +    compat_props_add(m->compat_props, pc_compat_7_2, pc_compat_7_2_len);
>> +}
>> +
>>   DEFINE_Q35_MACHINE(v7_2, "pc-q35-7.2", NULL,
>>                      pc_q35_7_2_machine_options);
>>   
>
> Would it make sense to remove the m->alias = NULL from the 7.1 and earlier 
> machine types now?

Hm, all of this is how we've done machine type updates for the last few
years :) We can certainly clean up the redundant stuff, but I'd prefer
to do that via a separate patch.